A communication tool like the Internet has been a huge revolution in our globalized world. Only in a few decades, the "Network of networks" has become the absolute protagonist in the field of virtual interrelations. And this technology, which facilitates the access and exchange of information to millions of people, has been forged in our socio-cultural context of Postmodernity. The result is an infinite conception of perspectives at the communicative level. Reality is frequently at the mercy of those subjectivities, capable of influencing large human groups according to certain interests. Therefore, together with the verification of the effectiveness and need of the Internet, this work aims to analyze the reason for the validity of these multiple truths, which have overcome the objective principles of Modernity (according to the supposed progress of Reason). In this regard, it is essential to examine phenomena such as the post-truth or the malicious use of social networks, which distort the authenticity of social and political situations of great significance. For this, it has been highly esteemed to extract essential notions of other publications, written or virtual, that address it with rigor. Likewise, it is very useful to analyze certain information on the Internet, which is due to the irreverence of pre-established interests. The conclusion derives from a necessary reflection on the alternatives of opinion that coincide with the individualism emanating from Postmodernism, with the Internet as an ally. Of the first order is the urgency of continuing to bet on education at all levels on an unlimited phenomenon.